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<p>Methylene blue (MB) and other organic dyes often pose significant environmental challenges, particularly when they enter water bodies as industrial waste from sectors such as textiles, plastics, and pesticides. However, during photocatalytic dye removal, sunlight is generally used to initiate the degradation process which might not be readily available in many places. In this study, we explore the potential of V<sub>3</sub>O<sub>7</sub> nanostructures, synthesized via a simple and cost-effective hydrothermal method to degrade MB dye solution without using any light source. The prepared nanostructures were characterized by X-ray diffraction, FESEM, Raman spectroscopy, FTIR spectroscopy, photoluminescence spectroscopy, ultraviolet–visible spectroscopy, BET, and EPR analysis. Here, a relatively small amount that is 20&#xa0;mg of V<sub>3</sub>O<sub>7</sub> is enough to effectively degrade 20&#xa0;ppm of the dye. In 110&#xa0;min, the V<sub>3</sub>O<sub>7</sub> nanostructures showed a MB degradation efficiency of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\sim\)</EquationSource> <EquationSource Format="MATHML"><math> <mo>∼</mo> </math></EquationSource> </InlineEquation> 95% in dark conditions. Upon adding NaBH<sub>4</sub>, the degradation process was significantly accelerated, and 95% dye degradation was achieved within 10&#xa0;min. The involvement of reactive oxygen species (ROS) in the degradation mechanism was identified, and the possible reaction pathways are also discussed. Hence, the mesoporous V<sub>3</sub>O<sub>7</sub> can act as a potential catalyst for effective MB dye removal from aqueous systems, under dark conditions.</p>

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Highly efficient light independent catalytic degradation of methylene blue using V3O7 nanostructures

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • J. S. Anju,
  • T. Shahba Shirin,
  • K. Rasitha,
  • Subhra R. Pattanayak,
  • P. M. Aneesh

摘要

Methylene blue (MB) and other organic dyes often pose significant environmental challenges, particularly when they enter water bodies as industrial waste from sectors such as textiles, plastics, and pesticides. However, during photocatalytic dye removal, sunlight is generally used to initiate the degradation process which might not be readily available in many places. In this study, we explore the potential of V3O7 nanostructures, synthesized via a simple and cost-effective hydrothermal method to degrade MB dye solution without using any light source. The prepared nanostructures were characterized by X-ray diffraction, FESEM, Raman spectroscopy, FTIR spectroscopy, photoluminescence spectroscopy, ultraviolet–visible spectroscopy, BET, and EPR analysis. Here, a relatively small amount that is 20 mg of V3O7 is enough to effectively degrade 20 ppm of the dye. In 110 min, the V3O7 nanostructures showed a MB degradation efficiency of \(\sim\) ∼ 95% in dark conditions. Upon adding NaBH4, the degradation process was significantly accelerated, and 95% dye degradation was achieved within 10 min. The involvement of reactive oxygen species (ROS) in the degradation mechanism was identified, and the possible reaction pathways are also discussed. Hence, the mesoporous V3O7 can act as a potential catalyst for effective MB dye removal from aqueous systems, under dark conditions.